Today's Observer is published with a free DVD of the acclaimed thriller Don't Look Now. One of the most chilling and erotic movies of its time and featuring stunning performances from two of the finest postwar screen actors, it was hailed as an instant masterpiece on its release in 1973. More than 30 years later, it is still recognised as a triumph. To mark our special giveaway, Sean O'Hagan talks to director Nicolas Roeg, while our film critic, Philip French, recalls the movie's original impact and explains the extraordinary chemistry that created this haunting tour de force.

How did Nicolas Roeg go from lowly cameraman to the legendary director of Don't Look Now, Performance and The Man Who Fell to Earth? In a rare interview, he tells all to Jason Wood. Read the full, unedited transcript.